Dashpot construction



' Feb. 28,3 928.

E. DAVIS DASHPOT CONSTRUCTION Filed July 2,"'192s 2 Sheets -Sheet 1 i INVENTOR.

ATTORNEYS.

Feb. 28, 1928.

E. DAVIS DASHPOT CONSTRUCTION Filed July 2, 1926 v I NVENTOR.

. ATTORNEYS,

Patented Feb. 28, 1928.

ERNEST/DAVIS, or symcusn, new "2031:, nssronon TO THE raosrnmmcomranr INQ, OF SYRACUSE, NEW.YORK,

Q Application filed July 2,

This invention relates to dash pots and particularly dash pots usable in. connection with pressing machines as garment and laundry pressing machines, which have a head or other movable element movable upwardly and downwardly and mgvable into closed position by power,-and into open position by a counter-weight or counter spring, the dash pot easing the opening movement of the head by the counter-weight or counter spring.

The invention consists in the novel features and in the combinations and con-' structions hereinafter set forth and claimed. In describing this. invention reference ishad to the accompanying drawings in which like characters represent corresponding parts in all the views. 4

Figure 1 is aside elevation of this dash pot constructions as ap lied to a garment or laundry pressing: mac constructlon.

Figure 2 is an dash pot.

Figure 3. is a Figure 2. I

Figure 4 is a detail view of the piston head. 0 v M This. dash pot construction comprises generally a cylinder, or a pot, a, piston movable in the cylinder, the cylinder being me of well known enlarged elevation of the sectional view on line 3-3,

so'formed as to provide a by-pass which by ags is gradually closed as the piston moves, J rom its starting position toward its operated position or the bottom of the dash pot, so that the by-p'ass is unprovided withvalves of an description;

- 'As here i1 ustrated this by-pass, which is gradually closed by the piston during its '40 stroke, is rovided by forming the cylinder or pot wit the tapered bore .of greater di- I ameter atone end than the piston so that an annular space encircles the piston, and of nearly the same diameter as the piston at the other end, .so that the piston has nearly a sliding fit at the bottom of the cylinder. Hence during the movement of the piston from its starting position to the bottom of the cylinder. or) pot the oil is dlsplaced around thepiston, that is from the lower side'tothe upper side of the plston through a gradually tapering assage.

1 designates the cy 'nder, 2 the p ston movable 1n the cylinder and having Q PIStOH red 3 extending through the gland or packed nnsnror' oonsrnucrroiw.

end ofthe piston and connected to the piston A CORPORATION? OFNEW Y ORK.

1926. Serial at. 120,115.,

bearin 4, formed in the head 5 at the upper end 0 the cylinder, the rod guiding the piston in its reciprocating movement.

10 is the head at the lower end of the cylinder. 7

As shown the cylinder is formed with its bore 11 tapered from its upper end toward its lower end thereby providing an annular space 12 around the piston when the piston is in the upper end of the'cylinder, which space gradually tapers into the diameter of the piston toward the lower end of the 'cylinder. Hence the tapered bore .forms a tapered by-pass around the cylinder, that is from the lower to the upper side thereof which by-pass is gradually closed during the movement of the piston.

The piston 2 is here shown as formed of a skeleton body consisting of upper and lower rings connected by 'lengthwlse frame members 13, and a head 14 closing the lower byJa screw 15 extending thrpugh a spring washer 16 and through said head 14, and threading into the lower endof the piston rod 3. The upper end of the piston body is threaded for receiving the lower threaded end ,of the piston rod 3.

The piston rod 3 is here shown. as connected to its actuator .by a lost motion or 7 in and slot connection, which lost motion 1s adjustable to regulate the length or throw of. the piston to any desired length with the starting position point of the piston alwa s at the same point regardless'of what t e adjustment is.

As here shown the piston rod, is provided with a slotted head or yoke 17 threaded at 18 on the upper end thereof and an adjustable shoulder is located at the lower end of the yoke, said shoulder being the head 19 of a screw 2.0 threading into the upper end of the rod 3. A suitable lock nut 22 threads onlithe screw 20. against the upper epd of the re Thev actuator is here shown as'the yoke or lever 23', which carries the head '24 of a pressing machine, which head is movable toward and from a buck 25 mounted on the frame 26 of the. ressing machine.

This frame inc udes an upwardly extending tandard 27 'towhich the lever 23 is pivoted between its ends at 28.. The lever isp'rovided with a suitable counterweight 29 at its rear end, which tends to bring the no as 1o press head 24 into its elevated position indicated in broken lines, Figure 1.

The. head is; actuated into pressing position in any well known manner, either by foot or by power. In either case when the applicable forgradually easing the opening 7 ofthe head due to the counterweight 29 01- the countersprings. As here shown the lever -23 is provided with a slide 30, which works in the slot of the head 17 toward and from ."the shoulder or head 19 of the adjusting screw. Owing to the adjusting screw, re-

gardless of theadjustment of the shoulder.

19, the piston 2 is always retracted to the same elevated position upon closing of the ress. I

The headlO of the cylinder is suitably pivoted by aball and socket joint 31 to the frame of the machine or the standard 27.- The slide is-here shown as provided on a forwardly extending arm 32 of the weight 29, whichweight is shown as secured to the rear arm of the lever 23 by a pivot 33, the

arm 32 hearing against the reararm of the lever or yoke, prevents weight from pivotal movement. It is immaterial, whether the 3| lever.

' slide 30 is carried directly by the rear arm of the lever or What I claim is:- I 1. a-dash pot comprising a cylinder, a

I piston movable in the cylinder and having 'a rod,'a yoke connected to the rod, a shoulder at the epd of the yoke adjacent the rod, the shoulderbeing adjustable lengthwise of the yoke, and an actpator connected to the yoke and having a part slidablc thereon toward and from said shoulder. 1

2. A dash pot construction comprising a cylinder, a piston movable in the cylinder and having a rod, a slotted head connected to the piston rod, a shoulder within the slot at one end thereof adjustable lengthwise of the slot and an actuator havin a slide movable in the slotted head towar and from the shoulder.

3. A dash pot construction comprising a cylinder, a piston movable in the cylinder and having a slotted head mounted'on the rod, a'screw threading endwise into the rod and having its head located at one end of the slot of the slotted head, and an actuator having a slide movable alon the slot into and out of engagement with t 1e head of the 4. The combination of a pressing machine including cooperating pressing elements, one o f which is movable toward and from the other, a carrier for the movable element comprising a lever pivoted to the frame, a dash pot comprising a cylinder connected to the frame, and a piston movable in the cylinder connected to said lever. i In testimony whereof, I have ,by the counter-weight of the.

hereunto 

